y轴值未显示在带有网页图形数据的实时烛台图上

Question

今天从cme网站和下一个功能计划拉动ES未来的OHLC创建一天的酒吧直播情节。有时y轴出现时带有当前价格值，有时会出现单位数值，即1,2,3,4,5 ax_setylim修复了这个问题。也没有使用另一个烛台绘图功能。

import bleach
import requests
from bs4 import BeautifulSoup
import matplotlib.pyplot as plt
from matplotlib.finance import candlestick2_ohlc
import matplotlib.animation as animation
from matplotlib import style

def get_data():

    req=requests.get('http://www.cmegroup.com/trading/
    equity-index/us-    index/e-mini-sandp500.html')
    html=req.text
    htmlBS=BeautifulSoup(html,'lxml')
    Open=(htmlBS.find('td',    
    id="quotesFuturesProductTable1_ESZ7_open")).contents
    Last=(htmlBS.find('td',  
    id="quotesFuturesProductTable1_ESZ7_last")).contents
    High=(htmlBS.find('td',  
    id="quotesFuturesProductTable1_ESZ7_high")).contents
    Low=(htmlBS.find('td',   
    id="quotesFuturesProductTable1_ESZ7_low")).contents
    #use bleach module to clean strong tag from Low
    Open=bleach.clean(Open,tags=[],strip=True)
    Last=bleach.clean(Last,tags=[],strip=True)
    High=bleach.clean(High,tags=[],strip=True)
    Low=bleach.clean(Low,tags=[],strip=True)
    def clean_ohlc(x):
        x=x.replace('[','')
        x=x.replace(']','')

        return x
    Open=clean_ohlc(Open)
    High=clean_ohlc(High)
    Low=clean_ohlc(Low)
    Last=clean_ohlc(Last)

    OHLC=[Open,High,Low,Last]
    OHLC=[x.strip("'").strip('"') for x in OHLC]
    OHLC=[float(x) for x in OHLC]
    O=[]
    H=[]
    L=[]
    C=[]
    O.append(OHLC[0])
    H.append(OHLC[1])
    L.append(OHLC[2])
    C.append(OHLC[3])
    return O,H,L,C

style.use('ggplot')
fig=plt.figure()
ax= fig.add_subplot(111)
def update(dummy):

    O,H,L,C= get_data()
    ax=plt.gca()
    ax.clear()
    ax.set_xlim([-.5,.5])
    candlestick2_ohlc(ax,O,H,L,C,width=.2,
    colorup='g',colordown='r',alpha=1.0)


anime=animation.FuncAnimation(fig,update,interval=25)
plt.show()